Circannual periodicities in the incidence of ulcerative colitis do persist in the era of chemotherapy.

Abstract

A series of 274 attacks (256 of them recurring) of ulcerative colitis in 158 subjects, observed between January 1974 and December 1990 in Bratislava (48 degrees N, 17 degrees E), Slovakia, has been processed by R.A. Fisher's periodogram and F. Halberg's cosinor procedure. In spite of the long-term administration of sulfasalazin and/or corticosteroids, an… (More)

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